F/A PIV Wiring

[joebell]

I am working in a building where the PIV keeps going into "trouble". I am not certain as to the trouble ie ground fault, open. The In house electrician thinks that replacing the wiring from the valve to the module in the building will solve the problem. Outside the building there are 2 PIVs being wired from the same junction box. When I opened the box I noticed that both valves were wired in series and connected to the same module. The building has had a panel upgrade from a conventional system to an addressable system. It is my opinion that the 2 valves should be monitereed seperatly. Is there any article in NFPA 72 that I can reference to find this out.

Joe

 

[mdshunk]

You'll often find conductors pulled in underground conduits to yard hydrant type PIV's that aren't of a type suitable for wet locations. I've found zip cord, many times, run to PIV valves.

 

[joebell]

Thanks Marc I guess my question has more to do with the 2 PIVs being wired in series and monitered as 1 point on the Fire Alarm system and whether that is in accorance with NFPA 72 as opposed to the wiring method

 

[mdshunk]

Thanks Marc I guess my question has more to do with the 2 PIVs being wired in series and monitered as 1 point on the Fire Alarm system and whether that is in accorance with NFPA 72 as opposed to the wiring method

I know. I substituted your question for one I wanted to answer. :grin:

 

[joebell]

I love that, it sounds alot like my boss.

 

[rdbutler]

Zoned systems are still in use and still being installed new. Addressable systems allow for specific point annunciation, but there is nothing in NFPA 72 that requires addressable systems to have only one point per address. On intelligent systems you can program a point to give a 'supervisory' condition instead of 'trouble', which would be more correct for a PIV. But if they are truly wired in series and connected to the same addressable module, then they are never going to give that 'supervisory' condition.

Hope this helps